1. IBD Referral Centre, Careggi University Hospital, Florence, Italy;
2. Department of Experimental and Clinical Biomedical Sciences “Mario Serio,” University of Florence, Florence, Italy;
3. Department of Gastroenterology, Henri Mondor University Hospital, Paris Est-Creteil University, Creteil, France;
4. Department of Clinical Medicine and Surgery, “Federico II” University of Naples, Naples, Italy;
5. Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy;
6. IBD Unit, “San Filippo Neri' Hospital, Rome, Italy;
7. Department of Surgery, Oncology and Gastroenterology, University of Padova, Padova, Italy;
8. Department of Gastroenterology, Ghent University Hospital, Ghent, Belgium;
9. Department of Gastroenterology, University Hospital of Larisa, Larissa, Greece;
10. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy;
11. Department of Gastroenterology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary;
12. Department of Gastroenterology, Erasme University Hospital, Brussels, Belgium;
13. IBD Center, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy;
14. Department of Gastroenterology, Dietetics and Internal Medicine–Poznań University of Medical Sciences, Heliodor Święcicki University Hospital, Poznań, Poland;
15. Department of Gastroenterology and Hepatology, Hospital de Santa Maria, Centro Hospitalar Universitário de Lisboa Norte, Lisboa, Portugal;
16. Clínica Universitária da Faculdade de Medicina de Lisboa, Lisboa, Portugal;
17. Moscow Clinical Scientific Center named after A.S. Loginov, Moscow, Russian Federation;
18. Gastroenterology Department, Algarve University Hospital Centre–Portimão Unit, Algarve, Portugal;
19. IBD-Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy;
20. Division of Gastroenterology, Department of Medical Sciences, University of Turin, Turin, Italy;
21. Department of Gastroenterology, University Hospital of Heraklion, Heraklion, Greece;
22. Division of Gastroenterology, Center for Autoimmune Liver Diseases, Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy;
23. European Reference Network on Hepatological Diseases (ERN RARE-LIVER), Fondazione IRCCS San Gerardo dei Tintori, Monza, Italia;
24. SOC Gastroenterologia ed endoscopia digestiva, Azienda USL Toscana Centro, Ospedale “San Giuseppe,” Empoli, Italy;
25. Hepatogastroenterology Unit, Department of Precision Medicine, University of Campania “Luigi Vanvitelli,” Naples, Italy;
26. CEMAD, IBD Unit, Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Rome, Italy;
27. Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-Princesa), Universidad Autónoma de Madrid (UAM), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Madrid, Spain;
28. Department of Medicine, Division of Gastroenterology, Mater Dei Hospital, Msida, Malta;
29. Hepato-Gastroenterology and Digestive Oncology, University Hospital CHU of Liège, Liège, Belgium;
30. Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda, Ospedale Maggiore Policlinico di Milano, Milan, Italy.